A Donald Trump protester might have made the best sign ever - everyone agrees

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Mocking a man who possesses such unshakable self-belief as Donald Trump has proved a tricky task at times during the US Republican primaries.

Opponents of the billionaire businessman have tried to insult him in every which way - from his hair to his religion - but not much has stuck. Even the Pope had a crack and he walked right through it.

Now, one protester has taken Reddit by storm with his attempt to satirise the presidential hopeful, by playing him at his own game.

"I know signs. I make the best signs. They're terrific. Everyone agrees," it reads, a clear reference to the Donald's penchant for self-aggrandisement.

The activist's humorous use of pseudo-Trump psychology assured he went viral in no time.

This meant Reddit users weren't far behind with their own suggestions for the next sign, using other classic Trump proclamations.

Reddit users mock Donald Trump
(Screengrab/Reddit)

"Make America Great Again!" became "Make Signs Great Again!" and a call for the deportation of illegal signs was made, a play on Trump's crusade against illegal immigrants.

Could this be a sign of Trump's campaign dwindling? Time will tell.